Crushing and grinding machine



June 1940.. M. E. MEINHARDT CRUSHING AND GRINDING MACHINE Filed April 17, 1939 A TTORNEYS.

f j z /3 +1 Patented June 11, 19403 UNITED STATES PATENT OFFICE Application April 17, 1939, SeriaLNOQtZGSQZZG t a a p a 1 Claim. (Cl. 83-43 This invention relates to a crushing and grinding machine which,-although more particularly intended for use as a rock crusher, may also be advantageously used to crush and grind a variety of other; substances.

Among the objects of the invention are; to provide a pulverizer which will operate in a more a eliicient manner in respect to progressively rew pair of recessed bosses the recessed portions ,base has a foot portion to end thereof at each upon the upper surface carried by said bolts.

clucing large chunks of rock, ore and the like to smallerrpieces until, :at last, they are finely pulverized, thus avoidingplacing too great a strain upon the. crushing elements at any stage of the reducing *operation; to provide improved means for varying. the amount of leverage exerted by the driving means upontthe crushing elements operated thereby; and to improve upon crushing machinery by providing a more sturdy and durable construction ndarrangement of parts for crushing and pulverizing the more obdurate classof'materials. a i

1 Otherobjects, advantages and features of invention will hereinafter appear. a

1 Referring in detail to the drawing,

Fig. 1 isa vertical mid section of the complete structure taken on line of Fig.2. a

qFig. 2*is an end elevation thereof.

Fig. B isk a fragmentalyside elevation illustrating enact the rocker: arms-and showing the connection thereof with its operating means.

jwReferring in detail to the drawing, the box or casing structure is shown having a bottom or base lll side walls ll and end walls l2. Said side in an alined underlying relation to each side wall I l, and extending fromone of these foot portions to the other said slot M of a downwardly side of which is a The space between theside walls II is bridged by two inclined, stationary jaw members H, which are identical in construction, each ofsaid jaw members having a thickened base portion l8 having its bottom surface rounded to seat thickened portion l8 having a concave face IS on its inner side, and on its outer sidehaving a of which are engaged by the adjusting bolts 2| which extend into bores 22 provided through adjacent end walls 12. Adjusting nuts 2m are Said nuts each seat upon a concaved bossgZlb projecting inwardly from the. casing wall, siderably greater diameter than the bolt which fittable within the upper jaw l3 extending from end of the base Ill, said and each bore 22 is of a con.

projects into it. Thisarrangement allows the bolt to swing a little, which is required for its proper adjustment. The upper part of each jaw I7 is thickenedgtofo m a head 23 having a shoulder which rests upon the wall I 2 and has a sliding movemen t inrelation thereto when the jaw is adjusted. Each cave face25 corresponding in size and shape to thelower face l9.

Each jaw I1 is provided with a facing plate 26 havingan arcuate-lower portion 2'lfittable within the jaw face l9 and an angular ,rlowert joint connection 30 and like upper joint connection 3|.between each jaw and jaw, head. 23 has a, conupper arcuate portion28 concavity .25. An

its facing plate aids in keeping eachrfacing plate in its operative position. The oppositeend portions ofeachstationary jaw I! are. also united tothe facing plate by means of like joints 32 and 33 The mid-length portion of each facing plate 26 has crushing teeth 34 and teeth 35is provided adjacent to each end of the straight portion of said facing plate, the teeth of eachpf-said jseries diminishing in height as they approach the; adjacentlend of the'plate.

tion of the casingstructure, said jaws being identical in construction and being furnished with identical crushing; plates ll; Each of these jaws a series of crushing has an arcuate t thickened upper part 40a and somewhat similar thickenedufoot portion 401). In order to mount said crushing plates 4| upon said jaws eachjaw is furnished withthe two lower angular joint connections 42 and 43 and like upper joint connections 44 and 45, each jaw 4| having aterminal projection directed toward its midlength to function as a part of an interlocking joint structure. Each plate 4| has central crushing teeth 46, and adjacent to each end of its straight face a like series of crushing teeth 41, which progressively diminish in height as they become more distant from the mid-length of the plate. The lower portion of the plate 4| has an arcuate part 48 and its upper portion has an arcuate part 49 to cooperate with the toothed arcuate parts of the stationary facing plates.

The toothed faces of the arcuate portions 48 and 49 of the facing plates 4| of the movable jaws define parts of a cylinder which has arcs that have much shorter radii than the radii of the arcs of the concave face portions of the stationary facing plates with which they cooperate. Hence two upwardlywidening feed intakes or throats 50 are provided at the lower part of the t t 25 A pair of upstanding slightly rockable crushing jaws 40 is mounted in the mid-length porbetween these parts, and a horizontal I-bearn walls of the casing,

structure, and also two downwardly widening feed discharge passages Like the crushing means, the driving means,

' next described, is duplicated at each side of the structure. I

At the top of the mid-length of each side plate II is a hub portion 55 which supports a short bearing shaft 56. A pendant oscillatory bar 51 has a bore through its bearing portion 58 to receive the projecting outer end portion of said shaft 56. Above said shaft 56 said bar 51 has a head 59 furnished at each side in a spaced relation to its center with a bore 60 into which is rockingly fitted a stub shaft 6| rigidly carried by an upward extension 46m of the jaw 40 at that side of the structure. The pendant bar 51 extends down below its pivotal mounting a considerable distance and has its lower end portion pivotally fastened at. 62 to an end of a connecting rod 63 which is driven by a crank 64 from a. .shaft 65. furnished with'a driving pulley 61. At the same end of the casing each side wall Ii has a projecting portion Ha by which is supported a bearing 66 to sustain said shaft 65.

In order to provide for varying the distance between the fulcrum of each arm 51 and its connection with the connecting rod 63, the'pivotal a bearing block connection is made by means of 16 adjustably supported by a screw 1| mounted between bosses 12 and carried by said arm 51. This feature being of a conventional character, further description thereof is unnecessary.

.The lower foot portion or arcuate part lllbof each central jaw member 40 is offset away from its mate, thereby affording a widened space 15 16 having its ends secured to the opposite side At each side of the web of this beam is placed a the machine.

roller bearing member 11 of a sufiicient diameter to .fill up the width of the space between said web and the, adjacent flat face of the foot portion 60b of the movablejaw 46 at its side of V This construction provides antifrictional bearing means for the lower portions of the movable jaws, said jaws moving vertically as well as having a swinging motion. The outer faces of the movable jaw members 40 correspond throughoutv in contour to the i-nnerfaces of their facing, plates M thus providing for a perfect interfitting when these parts are assembled.

The casing base '10 is provided with openings 18 to discharge dirta The side walls II have extends through this spacer openings 19 to afford access to the adjusting nuts Owing to the undercut character of the" shoulders of the connecting means30 and 3| of each facing plate 26, each of said facing plates must be moved in an edgewise manner into its attached relation to the bodyportion of the jaw 11 of which it forms a part, (and be detached in a similar manner) and this must be done before the assembled jaw members are placed within thecasing structure.

Owing to the fact that each of the movable jaws has a vertical, as well as a swinging movement, a pounding, aswell as a rubbing action takes place in the throat portions 50 and in the discharge passages 5|, which causes a more nearly perfect pulverizing of the substances acted upon by the machine.

The movable jaw assembly having the facing plates 4!, may be regarded,

from the standpoint of function, as a single jaw having a crushing surface ateach jside.

I claim: In a crusher, an open topped casing having a floor and side walls rectangularly arranged as Viewed in plan, the side walls of said casing extending farther up than its end walls, two inclined stationary oppositely disposed jaw members each of an elongated plate-like character and having a lower end portion resting upon the floor of said casing adjacent to its central portion, the upper portion of each saidstationary jaws having a head of a generally right angled contour in its lower outer portion with a rounded groove in its corner portion, the grooved part thus provided res-ting loosely upon a shoulder afforded therefor by the upper edge of the end wall at its end of the casing, the inner surface or said head being concave thereacross superjacent to said groove, extensible and contractible means positioned between said jaws lower end portion and the adjacent end wall of the casing to vary the inclination of such jaw, a lining member fo'r each jaw having a'convex outer portion fitting into the aforesaid concave surface of said head to aid in keeping in place, movable means occupying the space between said lining members of said stationary jaws to cooperate with them in the performance tion, and outlet means to materials. MAUDE E. MEINHARDT.

of a crushing operadischarge the crushed 

